| Imported post
I did the BSAC combined nitrox (50% max limit) then about 10 months later the TDI one. The TDI one gives you far more freedom to use it how you see it fitting in with your diving, whereas the BSAC one is too limiting with it's 50% max. If the TDI one was limited to 50% too, I wouldn't have bothered doing it. |